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London’s Tower Bridge, England
A combined draw-bridge and suspension bridge

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An SLJ90032 Bridge Girder is a giant construction machine used to build whole bridges

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  TYPICAL BRIDGE MODELS BUILT BY STUDENTS

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  TYPICAL BRIDGE MODELS BUILT BY STUDENTS

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Click to view required bridge design specs:

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SAICE 2022 Bridge Specifications and Materials

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SAICE 2022 Bridge Specifications and Materials

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Specifications:
● Span length > 78 cm (85 cm is a good length)

● Width max = 14 cm
● Clear passage way width atop the deck = 10 cm

● Height min = 10 cm

● Depth max = 9 cm
Materials:
 25 wooden sticks (approximately 0,5 cm x 0,5 cm x 60 cm).
 A selection of glues.
 A cardboard deck to be placed within the model.
 3 m length strong cotton string for use in final model.
 Some thin (coloured) string for temporary clamping.

Not allowed:

Doubling up of full length sticks (1 cm long “spacers” at least 5 cm apart are allowed between parallel running sticks only).

Excessive amounts of glue on the joints.

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THE BRIDGE DIMENSIONS:

1. Span:
The bridge will need to span a distance of 780mm between supports.

2. Thus if you want 30mm of bridge to sit on each support you will need to make your bridge 840mm in length.

3. If your bridge is only 780mm in total it will fall straight through the testing rig.

1. Height and Depth:

The bridge can have a maximum height of 200mm above the supports and

a maximum depth of 120mm below the supports.

1. Internal Clearance:

The cardboard deck needs to fit on the bridge and there should be a clear height of 100mm above the deck throughout, and a minimum width of 100mm throughout. i.e. if you pushed a wooden block of 100mm x 100mm along the deck it would move freely.

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VIDEO HIGHLIGHTS - SAICE BRIDGE BUILD TESTING 2021 

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VIDEO HIGHLIGHTS - SAICE BRIDGE BUILD TESTING 2021 

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SAICE WC Bridge Competition 2021 - Highlights

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SAICE Model Bridge Building Competition Guidelines_2022_rev0

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What Makes Bridges So Strong? | Engineering for Kids | STEAM | SciShow Kids

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TRUSSES - the secret to bridge strength 

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TRUSSES - the secret to bridge strength 

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Open this document and make sure to read through it carefully.

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Getting ready for bridge testing…